I’ve been having difficulties painting some mdf panelling. Preparation was zinniser BIN primer (two coats on edges and sanded back), then two coats of crown trade oil based full undercoat. Sanded back at each stage using 400 grit mirka abranet so lovely and smooth.
Come to finish with crown trade oil effshell and it doesn’t look great. To start I thinned slightly with white spirit (5% ish) and rollered on with a very short white dove roller, then did edges and laying off with a corona morro. Can see the brush strokes in it really badly, some running / drips and also see the undercoat in parts.
Then tried to thin it some more and it’s gone on better but it’s a very streaky finish.
Any advice would be gratefully received. Would you recommend different tools? Cut losses and get a different eggshell? It’s being painted navy blue so prefer oil finish.